225105071 has 4 divisors (see below), whose sum is σ = 234892272. Its totient is φ = 215317872.

The previous prime is 225105053. The next prime is 225105157. The reversal of 225105071 is 170501522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170501522 = 2 ⋅85250761.

It is a cyclic number.

It is not a de Polignac number, because 225105071 - 2²⁶ = 157996207 is a prime.

It is a super-3 number, since 3×225105071³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 9787177 = 225105071 / (2 + 2 + 5 + 1 + 0 + 5 + 0 + 7 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225105031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4893566 + ... + 4893611.

It is an arithmetic number, because the mean of its divisors is an integer number (58723068).

Almost surely, 2^225105071 is an apocalyptic number.

225105071 is a deficient number, since it is larger than the sum of its proper divisors (9787201).

225105071 is an equidigital number, since it uses as much as digits as its factorization.

225105071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9787200.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 225105071 is about 15003.5019578764. The cubic root of 225105071 is about 608.3148608306.

Adding to 225105071 its reverse (170501522), we get a palindrome (395606593).

The spelling of 225105071 in words is "two hundred twenty-five million, one hundred five thousand, seventy-one".